堂嫂

堂嫂	táng sǎo	wife of older male cousin via male line
堂	táng	(main) hall / large room for a specific purpose / CL:间 / relationship between cousins etc on the paternal side of a family / of the same clan / classifier for classes, lectures etc / classifier for sets of furniture
嫂	sǎo	(bound form) older brother's wife; sister-in-law